Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Barnard's Galaxy  ·  NGC 6822
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Barnard’s Galaxy—NGC 6822, 


            Russ Carpenter
Barnard’s Galaxy—NGC 6822
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Barnard’s Galaxy—NGC 6822

Technical card

Dates:July 15, 2020

Frames: 15x600"

Integration: 2.5 hours

Avg. Moon age: 24.41 days

Avg. Moon phase: 26.85%

Astrometry.net job: 3760940

RA center: 19h 44' 54"

DEC center: -14° 48' 39"

Pixel scale: 0.956 arcsec/pixel

Orientation: 270.471 degrees

Field radius: 0.460 degrees

Resolution: 2575x2319

Data source: Amateur hosting facility

Remote source: ChileScope


This is a barred irregular galaxy, part of the Local Group. It’s one of the closest galaxies to the Milky Way and is similar to the Small Magellanic Cloud.

Barnard’s Galaxy was very important in the history of astronomy. Edwin Hubble discovered 11 Cepheid variables in NGC 6822, which allowed him to measure the distance to the galaxy. He then wrote a paper in 1925 that resolved the “Great Debate” over the scale of the universe and the nature of spiral galaxies.

This image was captured with the RGB channels. I did not separately image Ha, because StarTools does an excellent job of presenting HII regions without a separate Ha channel.

Tech Notes for ASA 500/3.6:
ASA Newtonian, 500 mm aperture, 1900mm focal length, F3.6
FLI Proline 16803, 9 mm pixel, 4096 X 4096
ASA DDM85 equatorial mount
Processing with PixInsight and StarTools


Sky plot

Sky plot


Barnard’s Galaxy—NGC 6822, 


            Russ Carpenter